Seat Heaters with auto start

Hey guys, wanted to know if anyone knows how to turn on seat heaters with an aux output off of a remote start.  I've tried to figure it out, but I can't seem to duplicate what actually pushing the button does.  I have a 2001 GMC Sierra C3, and my wife has a 2005 Chevy Trailblazer.  I can't seem to find any tech info on DEI or Audiovox.   I'm guessing it will take some combination of relays and resistors, but I thought if someone out there has already done this no use racking my brain to try to figure it out (work smart not hard).  I really don't care about changing between Hi, Med, and Low, just want to turn them on.  Any help will be greatly appreciated. 

you have to run negative trigger right to the switch and solder onto it, I've seen it done on a yukon, but havent done it myself. may be able to pick it up at door module, and there may even be a databus interface that controls it. check out www.bypasskits.com . sorry not more specificMy rifle is my friend...